Fig. 4.
Microscopic view of intraneural injection into the median nerve at different magnifications. The spread of diluted heparinized blood was limited by the epineurium (Ep). Adipocytes (1) were not ruptured or deformed by the diluted heparinized blood. (A) Partial image of the nerve. The marker was localized outside the fascicles and was absent within the fascicles. (B) Partial image of the nerve. We can see the marker among the adipocytes, but there are not altered adipocytes. (C) Partial image of the nerve. The marker was only found outside the fascicles. (D) Partial image of the nerve. The marker was encountered only in contact with adipocytes, collagen fibers that enveloped the fascicles, and the internal surface of the epineurium. Magnification: A, ×200; B, ×240; C, ×500; D, ×800. Stain: hematoxylin and eosin. C, circumneurium; En, endoneurium; F, fascicle; P, perineurium.